Kids who have dogs get significantly more physical activity, compared to kids who don't. Researchers followed 600 children over three years, and found young girls got the biggest exercise boost.

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The new approach aims to promote overall fitness instead of focusing on specific exercises, and the devices will also give Guardians feedback about mental health, balanced eating and sleep.

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Whether it's exercise or housework, older Americans who move their bodies regularly may preserve more of their memory and thinking skills, even if they have brain lesions and other signs of dementia.

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No longer do kids with concussions need to sit in dark rooms for days on end. For the first time in nearly a decade, the nation's pediatricians have loosened their guidance on concussion recovery.

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After 10 years, the government has updated its physical activity advice. The new message? Every little bit of movement helps you stay healthy and is better than sitting on your couch.

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Most people don't need scans or surgery, but they do want relief from lower-back pain. Physical therapy isn't a cure, a study finds, but it did help some people regain mobility more quickly.

A new study shows that children in China who are mainly cared for by grandparents instead of Mom and Dad are twice as likely to be overweight — contributing to the country's obesity epidemic.

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How long can you sit still in a desk? How about your 7-year-old? Maybe you could both use a break. A study shows that kids who get to run around and play after school are better at paying attention.

Americans are much less active in their leisure time than they were 20 years ago; that's true even for young people. Up to half of people say they're completely sedentary. Desk jobs don't help.

Children and teenagers who are aerobically fit and and have good motor skills do better academically, researchers say. But muscle strength doesn't help. And those motor skills may matter most.

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